Smaller diameter particles can be wrapped between the HEPA and the supporting layer to enlarge the contact area with air; have a more significant adsorption effect on pollutants such as formaldehyde Compared with the composite filter of commonly activated carbon+HEPA, it has lower filtration resistance
Can efficiently remove harmful particles such as PM2.5 and 20nm diameter particles, formaldehyde and TVOC. Can efficiently remove some kinds of bacteria and common allergens.